Problem installing Desktop 5

I have downloaded Desktop for Mac 5 and I am having problems installing. Soon after clicking Install a script editor message appears with Open Dictionary as the title and "Unable to read the dictionary of the application or extension because it is not scriptable." as the message. Anyone have ideas?

tia

 

I suggest you reload the installer, maybe it's corrupt (although that's hard to believe if you allow the mounter to check the disk image while it's mounting). Are you running Leopard / Snow Leopard?